The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 03, 2008
Filed:
Jan. 24, 2007
Roozbeh Atarius, Lund, SE;
Torsten J. Carlsson, Lund, SE;
Håkan B. Eriksson, Lund, SE;
Kjell B. Gustafsson, Lund, SE;
Torgny Palenius, Löddeköpinge, SE;
Christer Östberg, Staffanstorp, SE;
Roozbeh Atarius, Lund, SE;
Torsten J. Carlsson, Lund, SE;
Håkan B. Eriksson, Lund, SE;
Kjell B. Gustafsson, Lund, SE;
Torgny Palenius, Löddeköpinge, SE;
Christer Östberg, Staffanstorp, SE;
Telefonaktiebolaget L M Ericsson (publ), Stockholm, SE;
Abstract
A searcher uses an input signal, and for example, a matched filter to generate a first set of candidate paths. A selector uses the input signal and the first set of candidate paths to generate a second set of paths. The second set of paths is used to configure the fingers of a RAKE receiver. According to one aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses M correlators to generate a set of M correlation values. The second stage uses the M correlation values to select N paths that are used to configure the N fingers of the RAKE receiver. According to another aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses a multiple of M correlators to track the M paths and generate a set of M estimates. The second stage uses the M estimates to select N paths that are used to configure the N fingers of the RAKE receiver. According to another aspect of the invention, the selector can generate new sets of N paths while the searcher is either active or inactive. The receiver can use a quality signal or a counter to notify the searcher and/or the selector to generate new sets of paths. The selector decreases the need to continuously run the matched filter. The receiver can re-configure the fingers without having to search for new paths. The receiver can also find paths that are uncorrelated and less susceptible to fading.